摘要
随着渤海油田开发开采,中深储层产能贡献占比逐渐增多,渤海油田中深层目前主力油田主要涉及垦利A油田和渤中油田,以垦利A油田这一典型中深层油田为例,主力层位为沙河街组,储层埋深较深,物性以中~低渗为主,原油性质为中~轻质油,含蜡量较高,粘土矿物含量高,储层温度高,生产及作业过程储层伤害风险大。自投产以来,中深层油井作业后产油恢复率和产油恢复井次占比呈逐年下降趋势,超86%的油井动管柱作业后含水升高,含水平均升高幅度超20%,油井作业后总产液能恢复,但产油恢复率低,含水升高的问题日益突出,严重制约了油田稳产开发。为解决中深层油田油井作业后产能大幅降低的问题,亟需针对该油田不同生产阶段的储层伤害机理及储层保护工艺对策开展攻关研究,指导升级修井液体系及物理防漏失工艺的应用,提升产能恢复和油田开发效果。
With the development and exploitation of the Bohai Oilfield,the contribution of medium and deep reservoirs to production capacity is gradually increasing.Currently,the main oil fields in the medium and deep layers of the Bohai Oilfield mainly involve the Kenli A Oilfield and the Bozhong Oilfield.Taking the Kenli A Oilfield as an example,the typical medium and deep oil field,the main reservoir is the Shahejie Formation,with a deep burial depth and mainly medium to low permeability.The crude oil properties are medium to light oil,with high wax content,high clay mineral content,high reservoir temperature,and high risk of reservoir damage during production and operation.Since its commissioning,the recovery rate of oil production and the proportion of oil production recovery wells in mid to deep oil wells have been decreasing year by year.More than 86%of oil wells have experienced an increase in water content after well repair operations,with an average increase of over 20%.The total liquid production of oil wells can recover after operation,but the problem of low recovery rate and high water content has become increasingly prominent,seriously restricting the stable production and development of oil fields.In order to solve the problem of significant reduction in production capacity after oil well operations in mid to deep oil fields,it is urgent to conduct research on reservoir damage mechanisms and reservoir protection technology strategies at different production stages of the oilfield,guide the upgrading of well repair fluid systems and the application of physical leak prevention processes,and improve production capacity recovery and oilfield development effects.
作者
宋玉良
石张泽
陈华兴
Song Yuliang;Shi Zhangze;Chen Huaxing(Tianjin Branch of CNOOC Limited,Tianjin 300459)
出处
《石化技术》
2024年第12期247-249,共3页
Petrochemical Industry Technology
关键词
中深层
储层保护
储层伤害
修井液
井下作业
Middle and deep oil layers
Reservoir protection
Reservoir damage
Well repair fluid
Workover operation
作者简介
宋玉良(1990-),男,井下作业总监(高级),2013年毕业于中国石油大学(华东)石油工程专业,获工学学士学位,现从事海上油田井下作业相关工作。
